Hard-hardening cement, cement mortar, cement concrete, road repair materials, and road repair methods

摘要

PROBLEM TO BE SOLVED: To provide a hard-hardening cement capable of simultaneously achieving high strength development in a short time and suppressing expansion after long-term curing. SOLUTION: The cement is a cement containing (A) a cement, (B) a hard material containing calcium aluminate and anhydrous gypsum, and (C) a coagulation modifier. Provided is a hard-hardening cement in which the SO3 / Al2O3 molar ratio is 0.60 or more and 0.80 or less, and the 3CaO / SiO2 / 2CaO / SiO2 molar ratio in the cement (A) is 4.0 or more. .. [Selection diagram] None